Airline Highway

==Baton Rouge bypass==
[[File:Airline HighwayLaPLaceLousiana.jpg|thumb|200px|Sign showing the intersection of [[U.S. Highway 61]] (Airline Highway) at [[U.S. Highway 51]] in [[LaPlace, Louisiana]]]]
[[Image:Baton Rouge, Louisiana 1955 Yellow Book.jpg|thumb|200px|1955 [[Interstate Highway]] plans, showing the Baton Rouge bypass on the Airline Highway as an urban route (numbered I-410 by 1959)]]

The portion of the Airline Highway north and east of downtown [[Baton Rouge, Louisiana|Baton Rouge]] carries [[U.S. Highway 61 (Louisiana)|U.S. Highway 61]] and [[U.S. Highway 190 (Louisiana)|U.S. Highway 190]] around downtown, and includes several [[interchange (road)|interchange]]s. The bypass was designated '''U.S. Highway 61/190 Bypass''' from 1957 to 1963,{{citation needed|date=February 2018}} after which US 61 and US 190 were moved onto it, and their old routes through downtown became [[U.S. Route 61 Business (Baton Rouge, Louisiana)|US&nbsp;61 Business]]/[[U.S. Route 190 Business (Baton Rouge, Louisiana)|US&nbsp;190 Business]]. The bypass and business routes originally intersected in a [[traffic circle]], which was replaced in 1963 by a [[cloverleaf interchange]].

In the original 1955 plan for [[urban area|urban]] [[Interstate Highway]]s, numbered by 1959, the Baton Rouge bypass was designated '''Interstate 410'''; it would have connected to [[Interstate 10 (Louisiana)|Interstate 10]] on both ends (as I-10 would have used the US 190 corridor immediately west of Baton Rouge, still crossing the [[Atchafalaya Swamp]] in its present location). The route was cancelled by the end of the 1960s, and the number was later reused for another [[Interstate 410 (Louisiana 1969)|I-410]] (which itself was cancelled in 1977).